District of qolumbia



NIELSPOULSON, OF WASHINGTON, DISTRICT 0F GOLUMBIA.

Letters Patent No. 82,031, dated September 8, 18678.

IMPROVED WINDOW-SHUTTER.

@in Stlgehnle mitten tu im4 tiges: Etnias @that mit mating pitt nf tigttime.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, NIELS POULsoN, of the city and county of Washington,and District of Columbia, have invented certain new arid usefulImprovements inWindow-Shutters; and `I do hereby declare the followingto .be a' sufficiently full, clear, and exact description thereof toenable one skilled in vthe art to which my said invention appertains tomake and carry it into effect, reference being had `to the accompanyingdrawings, which are made a part ofthis specification.

My improved window-shutters are constructed of plates of corrugatedmetal, attached to jointed frames, which consist of bars, hingedtogether in pairs, in such a manner that when lowered, a continuouscorrugated surface will be presented,'a.nd when drawn up, the corrugatedplates will fit together within a. compact space.

The invention further consists in an improved manner of attaching theplates to'the folding bars.

My invention also relates to a device for masking or protecting thevertical edges of the shutters when closed.

In the drawings- Figure 1 is an exterior view of a window, exhibitingone-half of my improved shutter inl its closed position.-

Figure 2 represents a vertical section thereof at X X, fig. 1.

Figure 3 represents a horizontal section ofthe same at Y Y, iig. 1.

Figures 4:, 5, 6, and 7, are views on a larger scale. v

Figure 4 represents a vertical section of a casing or receptacle in thewindow-cap or lintel, with the shutter drawn up and folded `within it.

Figure 5 represents a vertical section of a portion of the shutter aslowered or closed.

Figure 6. is an external view of a portion of the closed shutter, Figure7 represents a 'horizontal section of a portion ofthe shutter and itsguiding-frame, and other accessories, in thc plane indicated by the lineP P in ig. 5.

Similar letters of reference indicate corresponding parts in the severalfigures.

A A2 represent metallic bars, arranged crosswise in pairs, andhingedtogether at the points A A, after the manner of the structureffamliarly known as the Jacobs ladder 'or lazy-tongs. To theinner bar, A, of each pair is rigidly attached a corrugated metallicplate, B, the respective edges of which are reilexed in oppositedirections, as represented at b, so that when the shutter is lowered,the adjacent plates will interlock, and mutually support each other,and-will thus possess the strength and rigidity of a continuous plate.

The pivot-pins A1, at the intersections of each pair of hars, areextended laterally to a sufficient length to work in vertical slots C,formed in the faces of the boxes C, in which the elevating-cords orchains, E, are enclosed. The chains E may be connected at their'upperends to a winch, of any common and suitable construction, and at theirlower ends are attached to the ends of a horizontal bar or plate,D,Aattached to the hinged bars A A2, at their lower extremity, andconstituting the base of the shutter.

The har or plate 4D may be made of sutiicient width to close, whenelevated, the box or chamber F, which receives the folded shutter, or aseparate plate, D', may 'be attached to the plate D for this purpose,asreprevsented in fig. 4. Inthe upper portion of this'tig. 4, the plates Bare omitted, exposing the mortises B', in the bars A, to receive tenonson the ends of the plates B.

The shutter may he held down by a pin or bolt, K, operated from theinside of the window, and engaging 1n the base-bar D.

G G. represent parts of the stationary window-frame. p

To cover. and protect the vertical edges of the shutter, I employmovable plates M, of segmental form, with scalloped edges, fitting theeorrugations oi' the plates B. The movable plates M work in verticalslots Mr, in stationary plates, attached to the window-frame, so thatthey may be slipped within the frame, as represented by dotted lines iniig. 7, when the shutter is to be raised. In their outer position theyare locked by any suitable device which may be accessible onlyifromwithin the building.

In some cases it will be found preferable to make the shutters in twoparts, sliding horizontally, instead of vertically, and meeting in thecentre. Under this arrangement they will be very useful as doors.` ylFrom an inspection of gs. 4 and 5, of the drawings, the bars A will beseen to have, near each end, a curvature, A, in opposite directions.This arrangement enables me to form the mortises or recesses, B, whichlreceive the tenons 6', ofthe plates B, alternately in opposite edges ofthe bars, excepting in case of the end mortises, which are formed in thetransverse centre of the bars. This disposition of the tenons onoppositeedges of the supporting-bars, causes the plates to be `heldfwithgreat security, so that theycannot possibly be ,displaced when theshutters are closed.

Having thus describedvmy invention, the following is what I claim as newtherein, and desire to secure by i Letters Patent 1. I claim thecombination of the folding bars A A2, and corrugated plates' B, whensaid plates are attached rigidly tothe inner bars A, as herein describedfor the purposes specied.

2. I also claim the sliding plates M, in the described combination, withthe folding shutter A Az B, to

mask' or protect the vertical edges of the said shutter, substantiallyas explained.

3. I'claim the arrangement of the tenons of the plates B, alternately onopposite edgesof the bara A, substantially as and for the purposes setforth, l l

l NIELS POULS'ON Witnesses:

WM. H. BRERETON, J. E. M. BOWEN.

